What do you See? On a table there's a string which is laying across it and at the end there is a weight that is holding it down. The girl is sitting and playing with the string. There is a cup under the string that causes the string to make different noises when the string length is different or when the cup is placed in different places. The harder the string is plucked the louder the sound is going to be.
What do you Think? By changing the strings thickness length or tightness then instruments will make different sounds. The tighter the string is the higher the pitch is going to be and the looser the string is the deeper the sound is going to be. The circle in the center of a guitar helps produce these sounds and control the guitar.
What does a road sound Technician do? Their job is to make sure that nothing goes wrong with the audio while on the road doing a tour or concert he's making sure that the people in the audience can hear and enjoy the concert without it being too loud or too quiet. Basically their job consists of just running a munch of sound checks.
Physics Talk
sound is caused by vibrations
when the vibrations change the sound changes
length and tension change which changes the sound
when the tension changes the pitch changes
when the length changes the pitch changes
pitch is not volume
pitch is how high or low the sound is
the tighter a sing the higher the pitch
the looser the string the lower the pitch
as the tension gets bigger so does the pitch
Checking up Questions 1.
When the tension gets higher then the pitch also gets higher
2.
The shorter the string is the higher the pitch is
3.
The pitch gets higher because the tension was increased
4.
Vibrations cause percussion instruments to work
Inquiring Further
Hearing is basically feeling vibrations in a more complex way. Deaf people don't live in a world of silence, they feel the vibrations. It is harder to feel higher frequency vibrations that high frequency vibrations so Dame Evelyn Glennie had to work harder to hear. She felt vibrations through the walls by putting her hands up against the wall while her teacher played notes. This is how she learned and heard things, through the vibrations
Physics To Go 1.
You add mass to add tension
You take away mass to take away tension
the higher the pitch the more tension
2.
By holding the string in different positions you can change the length
the shorter the string the higher the pitch
the longer the string the lower the pitch
3.
by adding tension, the pitch stays the same
if you add tension, the string stays the same length
the less tension the less weight you need to keep the pitch the same
4.
It would change the pitch regarding on how you changed the pitch
5.
By changing the tension and the length of the strings and how hard they pluck them then the sound of the instrument will change, you tune a guitar by adding tension and you can tune a piano by tightening the strings also.
6.
they add tension by tightening the strings
you need to change the tension to produce different sounds
as the tension becomes less the pitch becomes less also
7.
the frets control how much each string on a guitar can vibrate
there are no frets on them
there are a lot more strings then on the one of a guitar so its harder to find the right pitch
What do you Think Now?
By tuning and instrument you can change the pitch and the sound that the instrument creates. The tighter the string is held the higher the pitch is going to be and the looser the string is held then the lower the pitch that is made is going to be. The shorter the string the higher the pitch is and the longer the string the lower the pitch is. How hard you hit the string determines the volume of the sound that you can make.
Section 2
What do you See?
There's a girl that's surfing on a wave in the ocean and in front of the wave you see a spring that is going across the wave and it looks like the two are both exactly the same.
What do you Think?
The top of a wave always moves faster than the bottom part of the wave so when you're at the beach and you see a wave that is crashing you will see the top fall over the bottom of the wave and hit the sand first.
Physics Talk
Wave-
the transfer of energy without a transfer of mass
you can use chemical or mechanical energy to transfer energy through objects
Medium-
the material that the energy is transferred through
Ex: the surface of the water on a water wave
periodic wave-
a repetitive series of pulses
crest-
highest point on a wave
trough-
the lowest point on the wave
wavelength-
distance from one point on a wave to the same point on the next wave
frequency-
number of vibrations
period-
amount of time it takes to complete a full wave
the period and the frequency are inversely related
transverse wave-
the direction of the medium is perpendicular to the direction of the wave
standing wave-
a wave pattern that moves in a constant position
node-
stop on the wave where the stand wave is motionless
antinode-
when the displacement is the biggest on a standing wave
the node is the pinched part of the wave
Checking Up
1.
A wave is the transfer of energy throughout a wave without the transfer of the mass
2.
Transverse wave-
when the direction of the medium of a wave is perpendicular to the direction of that wave
Compressional Wave-
when the medium is parallel to the direction of the wave
3.
Node-
the motionless spot on a stranding wave
Antinode-
the biggest displacement on a standing wave
Physics To Go
1.
amplitude- 10, 20, and 20 cms
wavelength- crest to trough
frequency- reciprocal of the period
speed- distance/time
amplitude- meters
wavelength- meters
frequency- hertz
speed- m/s
amplitude is the only one that changes
2.
the faster you shake the spring the higher the frequency gets
the medium changes the speed
the speed gets higher
the amplitude always remains the same
3.
you measure one point on a wave to the same exact point on the next wave
4.
The frequency is the amount of vibrations during a certain amount of time
5.
wavelengths are measured in meters
frequency is measures in hertz
speed is m/s
the wavelength time the frequency gives you the speed
6.
standing wave-
a wave that stays in a constant position while following a pattern
measure one position on one wave to the same position on the next wave
7.
longitudinal waves
energy is parallel to the medium
transverse wave-
energy is perpendicular to the medium
coiled springs-
transverse or longitudinal waves
8.
increase the frequency by making the string move faster
decrease the frequency by making the string move slower
9.
1, 2, 3, 4, and 5 meters
the more waves there are the higher the frequency is
10.
20 meters
1/2
2/1
2 Hz
d/t
20/2
10 m/s
11.
3m + 2m
5 m
if you switched them then it would be 3m - 2m and you would only have 1m
12.
s= m/s
s= 4.5(2)/2.64
s= 9/2.64
2.41 m/s
13.
the node
6m - 3m + 3m
it would be 1.5 because you can divide it by 2
What do you think you?
The water moves in an up and down motion and the energy moves perpendicular to the water making it a transverse wave.
Section 3
What do you see?
There are all of these children sitting in a room and they're all playing different instruments. They're all string instruments one of them is playing a harp and there is another that is sitting on a chair just playing with one string instead of the many that are on the harps.
What do you think?
When you make the string shorter then the pitch in the string gets higher and when you make the string longer the pitch in the string gets deeper.
Physics Talk
length of the string determines the wavelength
higher frequency
shorter string
lower frequency
longer string
wave speed-
length x frequency
when the length decreases the frequency increases
when the length increases the frequency decreases
tension doesn't effect wavelength
Checking up 1.
The smaller the wave length the higher the frequency: the equation is lamda=2l/n
2.
The more tension the higher the pitch, the more tension the faster the string vibrates
3.
The more tension the higher the frequency, the higher the frequency the faster the speed
4.
l=(n)(x)(lamda)/(2)
What do Think Now?
The heavier the tension is in the string the harder it is for the string to create a wave. The harder it is to create the wave the smaller the frequency is. The smaller the frequency the higher the pitch and the lower the pitch the higher the frequency. They are all inversely or directly related.
Section 4
What do you see?
There are people all lined up playing different instruments, they are all for wind instruments. By the picture you can see that there are different sounds coming out of each of the instruments. It looks as if it takes more energy to use the smaller instruments rather the the larger ones.
What do you Think Now?
By covering up holes on the wind instruments it creates different sounds. The breaths that you take through the instrument either become longer or shorter and that it what adjusts the sounds. If you change the length of the wind instrument the pitch will also change because the wind travels a shorter or longer distance.
Checking up
1.
The medium would be the air. The sound travels through the air through diffraction in wave form.
2.
Diffraction of waves happens when the rays bend off of surfaces and then change directions.
3.
Wavelength x frequency = speed of the wave Everything remains constant it is all a direct relationship.
Chapter 5
Section 1
Table of Contents
On a table there's a string which is laying across it and at the end there is a weight that is holding it down. The girl is sitting and playing with the string. There is a cup under the string that causes the string to make different noises when the string length is different or when the cup is placed in different places. The harder the string is plucked the louder the sound is going to be.
What do you Think?
By changing the strings thickness length or tightness then instruments will make different sounds. The tighter the string is the higher the pitch is going to be and the looser the string is the deeper the sound is going to be. The circle in the center of a guitar helps produce these sounds and control the guitar.
What does a road sound Technician do?
Their job is to make sure that nothing goes wrong with the audio while on the road doing a tour or concert he's making sure that the people in the audience can hear and enjoy the concert without it being too loud or too quiet. Basically their job consists of just running a munch of sound checks.
Physics Talk
Checking up Questions
1.
- When the tension gets higher then the pitch also gets higher
2.- The shorter the string is the higher the pitch is
3.- The pitch gets higher because the tension was increased
4.Inquiring Further
Hearing is basically feeling vibrations in a more complex way. Deaf people don't live in a world of silence, they feel the vibrations. It is harder to feel higher frequency vibrations that high frequency vibrations so Dame Evelyn Glennie had to work harder to hear. She felt vibrations through the walls by putting her hands up against the wall while her teacher played notes. This is how she learned and heard things, through the vibrations
Physics To Go
1.
- You add mass to add tension
- You take away mass to take away tension
- the higher the pitch the more tension
2.- By holding the string in different positions you can change the length
- the shorter the string the higher the pitch
- the longer the string the lower the pitch
3.- by adding tension, the pitch stays the same
- if you add tension, the string stays the same length
- the less tension the less weight you need to keep the pitch the same
4.- It would change the pitch regarding on how you changed the pitch
5.- By changing the tension and the length of the strings and how hard they pluck them then the sound of the instrument will change, you tune a guitar by adding tension and you can tune a piano by tightening the strings also.
6.- they add tension by tightening the strings
- you need to change the tension to produce different sounds
- as the tension becomes less the pitch becomes less also
7.What do you Think Now?
Section 2
What do you See?
What do you Think?
Physics Talk
Checking Up
1.
- A wave is the transfer of energy throughout a wave without the transfer of the mass
2.- Transverse wave-
- when the direction of the medium of a wave is perpendicular to the direction of that wave
- Compressional Wave-
- when the medium is parallel to the direction of the wave
3.Physics To Go
1.
- amplitude- 10, 20, and 20 cms
- wavelength- crest to trough
- frequency- reciprocal of the period
- speed- distance/time
- amplitude- meters
- wavelength- meters
- frequency- hertz
- speed- m/s
- amplitude is the only one that changes
2.- the faster you shake the spring the higher the frequency gets
- the medium changes the speed
- the speed gets higher
- the amplitude always remains the same
3.- you measure one point on a wave to the same exact point on the next wave
4.- The frequency is the amount of vibrations during a certain amount of time
5.- wavelengths are measured in meters
- frequency is measures in hertz
- speed is m/s
- the wavelength time the frequency gives you the speed
6.- standing wave-
- a wave that stays in a constant position while following a pattern
- measure one position on one wave to the same position on the next wave
7.- longitudinal waves
- energy is parallel to the medium
- transverse wave-
- energy is perpendicular to the medium
- coiled springs-
- transverse or longitudinal waves
8.- increase the frequency by making the string move faster
- decrease the frequency by making the string move slower
9.- 1, 2, 3, 4, and 5 meters
- the more waves there are the higher the frequency is
10.- 20 meters
- 1/2
- 2/1
- 2 Hz
- d/t
- 20/2
- 10 m/s
11.- 3m + 2m
- 5 m
- if you switched them then it would be 3m - 2m and you would only have 1m
12.- s= m/s
- s= 4.5(2)/2.64
- s= 9/2.64
- 2.41 m/s
13.What do you think you?
Section 3
What do you see?
What do you think?
Physics Talk
Checking up
1.
- The smaller the wave length the higher the frequency: the equation is lamda=2l/n
2.- The more tension the higher the pitch, the more tension the faster the string vibrates
3.- The more tension the higher the frequency, the higher the frequency the faster the speed
4.What do Think Now?
Section 4
What do you see?
What do you Think Now?
Checking up
1.
- The medium would be the air. The sound travels through the air through diffraction in wave form.
2.- Diffraction of waves happens when the rays bend off of surfaces and then change directions.
3.